package openfl.filters {
	
	
	/**
	 * @externs
	 * The BlurFilter class lets you apply a blur visual effect to display
	 * objects. A blur effect softens the details of an image. You can produce
	 * blurs that range from a softly unfocused look to a Gaussian blur, a hazy
	 * appearance like viewing an image through semi-opaque glass. When the
	 * `quality` property of this filter is set to low, the result is a
	 * softly unfocused look. When the `quality` property is set to
	 * high, it approximates a Gaussian blur filter. You can apply the filter to
	 * any display object(that is, objects that inherit from the DisplayObject
	 * class), such as MovieClip, SimpleButton, TextField, and Video objects, as
	 * well as to BitmapData objects.
	 *
	 * To create a new filter, use the constructor `new
	 * BlurFilter()`. The use of filters depends on the object to which you
	 * apply the filter:
	 *
	 * 
	 *  * To apply filters to movie clips, text fields, buttons, and video, use
	 * the `filters` property(inherited from DisplayObject). Setting
	 * the `filters` property of an object does not modify the object,
	 * and you can remove the filter by clearing the `filters`
	 * property. 
	 *  * To apply filters to BitmapData objects, use the
	 * `BitmapData.applyFilter()` method. Calling
	 * `applyFilter()` on a BitmapData object takes the source
	 * BitmapData object and the filter object and generates a filtered image as a
	 * result.
	 * 
	 *
	 * If you apply a filter to a display object, the
	 * `cacheAsBitmap` property of the display object is set to
	 * `true`. If you remove all filters, the original value of
	 * `cacheAsBitmap` is restored.
	 *
	 * This filter supports Stage scaling. However, it does not support general
	 * scaling, rotation, and skewing. If the object itself is scaled
	 * (`scaleX` and `scaleY` are not set to 100%), the
	 * filter effect is not scaled. It is scaled only when the user zooms in on
	 * the Stage.
	 *
	 * A filter is not applied if the resulting image exceeds the maximum
	 * dimensions. In AIR 1.5 and Flash Player 10, the maximum is 8,191 pixels in
	 * width or height, and the total number of pixels cannot exceed 16,777,215
	 * pixels.(So, if an image is 8,191 pixels wide, it can only be 2,048 pixels
	 * high.) In Flash Player 9 and earlier and AIR 1.1 and earlier, the
	 * limitation is 2,880 pixels in height and 2,880 pixels in width. If, for
	 * example, you zoom in on a large movie clip with a filter applied, the
	 * filter is turned off if the resulting image exceeds the maximum
	 * dimensions.
	 */
	final public class BlurFilter extends BitmapFilter {
		
		
		/**
		 * The amount of horizontal blur. Valid values are from 0 to 255(floating
		 * point). The default value is 4. Values that are a power of 2(such as 2,
		 * 4, 8, 16 and 32) are optimized to render more quickly than other values.
		 */
		public var blurX:Number;
		
		/**
		 * The amount of vertical blur. Valid values are from 0 to 255(floating
		 * point). The default value is 4. Values that are a power of 2(such as 2,
		 * 4, 8, 16 and 32) are optimized to render more quickly than other values.
		 */
		public var blurY:Number;
		
		/**
		 * The number of times to perform the blur. The default value is
		 * `BitmapFilterQuality.LOW`, which is equivalent to applying the
		 * filter once. The value `BitmapFilterQuality.MEDIUM` applies the
		 * filter twice; the value `BitmapFilterQuality.HIGH` applies it
		 * three times and approximates a Gaussian blur. Filters with lower values
		 * are rendered more quickly.
		 *
		 * For most applications, a `quality` value of low, medium, or
		 * high is sufficient. Although you can use additional numeric values up to
		 * 15 to increase the number of times the blur is applied, higher values are
		 * rendered more slowly. Instead of increasing the value of
		 * `quality`, you can often get a similar effect, and with faster
		 * rendering, by simply increasing the values of the `blurX` and
		 * `blurY` properties.
		 *
		 * You can use the following BitmapFilterQuality constants to specify
		 * values of the `quality` property:
		 *
		 * 
		 *  * `BitmapFilterQuality.LOW`
		 *  * `BitmapFilterQuality.MEDIUM`
		 *  * `BitmapFilterQuality.HIGH`
		 * 
		 */
		public var quality:int;
		
		
		/**
		 * Initializes the filter with the specified parameters. The default values
		 * create a soft, unfocused image.
		 * 
		 * @param blurX   The amount to blur horizontally. Valid values are from 0 to
		 *                255.0(floating-point value).
		 * @param blurY   The amount to blur vertically. Valid values are from 0 to
		 *                255.0(floating-point value).
		 * @param quality The number of times to apply the filter. You can specify
		 *                the quality using the BitmapFilterQuality constants:
		 *                
		 *
		 *               * `flash.filters.BitmapFilterQuality.LOW`
		 *
		 *               * `flash.filters.BitmapFilterQuality.MEDIUM`
		 *
		 *               * `flash.filters.BitmapFilterQuality.HIGH`
		 *                
		 *
		 *                High quality approximates a Gaussian blur. For most
		 *                applications, these three values are sufficient. Although
		 *                you can use additional numeric values up to 15 to achieve
		 *                different effects, be aware that higher values are rendered
		 *                more slowly.
		 */
		public function BlurFilter (blurX:Number = 4, blurY:Number = 4, quality:int = 1) {}
		
		
	}
	
	
}